Wyred 4 Sound mPRE - Manual (Page 8)

pg. 6
through the mPRE at unity gain. For example, if you feed 2.0V in you will get 2.0V
out. This allows you to use the volume control of your processor to adjust the level
of the gear connected to the mPRE. This is a configuration switch and must be set
with the mPRE powered completely off!
Variable/Fixed Out
There are two RCA pre-outs on the back of the mPRE. One of these outputs,
indicated by #11 on the back panel diagram (pg. 8), can be easily configured as a
variable or fixed unity gain output. In variable mode, it is a standard pre-out that is
suitable to be connected to an amplifier or powered subwoofer. When the 2
position switch indicated by number #13 on the back panel diagram is in the “in
position”, it will be a unity gain output. The fixed output configuration is perfect for
feeding a signal to a second system or when recording. This is a configuration
switch and must be set with the mPRE powered completely off!
DC Trigger
On the left side of the rear panel you will find a 12V DC trigger input and
output. If the HT bypass is not active, the trigger-in will turn the unit on from a
standby state (illuminated green around the power button) to that last used input
before the unit was turned off. When HT bypass is active, the trigger in will power
the mPRE on directly to the Aux 2 input (HT bypass). Trigger out will be active
whenever the mPRE is powered on. (Current Rating 20mA)
USB Configuration (MAC)
Please follow these steps when connecting your new unit to a Macintosh
computer. The USB interface is certified USB 2.0 High Speed and Audio Class 2.0
compliant meaning that no drivers are required for Mac systems 10.6.4 and later.
1. Connect a USB cable from the mPRE to the computer with the mPRE and
computer powered on.
2. The USB device will automatically install but there will not be any indication
aside from the device showing up in the Audio MIDI.
3. It is now necessary to select the mPRE as the output device for your
computer. Please locate the Audio Midi setup by following this directory:
Click On Finder----> Applications---> Utilities----> Audio Midi setup.
4. Once you have reached the Midi setup you will need to select the “Wyred 4
Sound 24/192 USB Audio Out” as the default output device and apply the
setting. To apply the setting click on “Wyred 4 Sound 24/192 USB Audio Out”
and then click on the “gear” icon located at the bottom of the window. When